The book chapter, written by authors Katja Kavkler, Nina Gunde-Cimerman, Polona Zalar in Andrej Demšar, deals with the investigations of hystorical textile objects attacked by fungi. Preservation of historical objects is of the outmost importance for future generations, as such objects have great social, historical, cultural and educational value. Fungal contaminations of textile objects in particular can alter the appearance, the structural and mechanical properties of an object, which can consequently prove difficult to conserve or to return to its former state. The present chapter describes an interdisciplinary approach for mycologists, textile scientists, and art restorers to better understand the impact of fungi on historical textile objects. The diversity and frequency of occurrence of different fungal species for each selected material (cotton, linen, silk, wool) is here investigated, and the available literature is reviewed. The impacts of selected fungal species are further examined by inoculation of pure cultures on artificially prepared laboratory samples, with incubation in a controlled environment. Analyses of the fungal impact on hystorical textile objects are presented, with the accent on non-destructive analytical methodologies, including tensile tests, scanning electron microscopy, Raman spectroscopy, and Fourier transform infrared spectroscopy.
The research presented the preparation procedure of colloidal silver solution in two solvents, namely water and ethanol under appropriate conditions. Colloidal silver solutions were applied on the PLA fibres by the exhaustion method in order to achieve their antimicrobial activity. Shape, size and chemical composition of silver nanoparticles (Ag ND) in colloidal solution were determined by UV-Vis spectroscopy and transmission electron microscopy with energy-dispersive X-ray spectroscopy (EDS). Morphological properties of finished fibres were studied by scanning electron microscopy; the presence of Ag ND on their surface was proved by EDS analysis. Concentration of Ag on finished fibres was determined by inductively coupled plasma mass spectroscopy. Bactericidal properties of finished PLA fibres were studied according to the AATCC 100-1999 standard method. The results of the research showed that mostly monomers of Ag ND were formed in water as well in ethanol colloidal solution, which were spherical in shape and whose size did not exceed 15 nm. The used solvent greatly influenced the amount of adsorbed Ag on the PLA fibres. The concentration of the adsorbed Ag was higher on the fibres finished in water than in ethanol. The application of Ag ND from both solvents provided excellent antibacterial protection of PLA fibres. Unlike water, finishing of fibres in ethanol caused morphological changes of the fibres.
COBISS.SI-ID: 2957168